Bennett, E.M. (7 February 1978), New taxa and new combinations in Australian Pittosporaceae. Nuytsia 2(4): 185, figs 1d, e. [comb. et stat. nov.]

• Type: Billardiera ringens (Harvey) E.Bennett

basionym: Calopetalon Harv. legitimate

Cayzer, L.W. & Crisp, M.D. (9 March 2004), Reinstatement and revision of the genus Marianthus (Pittosporaceae). Australian Systematic Botany 17(1): 128 [taxonomic synonym]

taxonomic synonym of: Marianthus Hügel ex Endl. legitimate

Council of Heads of Australasian Herbaria (2007), Australian Plant Census: - [taxonomic synonym]

taxonomic synonym of: Marianthus Hügel ex Endl. legitimate

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